An Intrigrated Novel Approach in MCDM under Fuzziness

Multiple Criteria Decision Making (MCDM) shows promising areas of applications in the field of computational technique of proper project selection. There are four distinct families of methods in MCDM: (a) the outranking,(b) the theory based on value and utility, (c) the multiple objective programming and (d) collaborative decision and negotiation theory based method. An Analytical way to reach the best possible solution of project selection is most desirable. Analytical Hierarchy Process (AHP) is one of the best ways for deciding among the complex criteria structure in different levels. Fuzzy AHP is a synthetic extension of classical AHP method under fuzziness. A fuzzy decision may be viewed as an intersection of the given goals and constraints. A maximizing decision is defined as a point in the space of alternatives at which the membership function of a fuzzy decision attains its maximum value. This paper aims at the integration of fuzzy AHP and Additive Ratio Assessment Method (ARAS). It actually deals with a novel integrated approach of dual synthesis of project selection. At first fuzzy AHP, method is used to find the criteria coefficient with the performance evaluation in a certain environment where triangular fuzzy number describes the subjectivity of vagueness of the criteria. In the second phase, ARAS method is used to determine the rank of the final project selection

MCA Based Performance Evaluation of Project Selection

Multi-criteria decision support systems are used in various fields of human activities. In every alternative multi-criteria decision making problem can be represented by a set of properties or constraints. The properties can be qualitative & quantitative. For measurement of these properties, there are different unit, as well as there are different optimization techniques. Depending upon the desired goal, the normalization aims for obtaining reference scales of values of these properties. This paper deals with a new additive ratio assessment method. In order to make the appropriate decision and to make a proper comparison among the available alternatives Analytic Hierarchy Process (AHP) and ARAS have been used. The uses of AHP is for analysis the structure of the project selection problem and to assign the weights of the properties and the ARAS method is used to obtain the final ranking and select the best one among the projects. To illustrate the above mention methods survey data on the expansion of optical fibre for a telecommunication sector is used. The decision maker can also used different weight combination in the decision making process according to the demand of the system.Comment: 9 Pages,1 Figure, 7 Table

An Evolutionary Algorithm for Multi-criteria Resource Constrained Project Scheduling Problem based On PSO

AbstractThis paper is regarding the Particle Swarm Optimization (PSO)-based approach for the solution of the resource-constrained project scheduling problem with the purpose of minimizing cost. In order to evaluate the performance of the PSO based approach for the resource-constrained project scheduling problem, computational analyses are given. As per the results the application of PSO to project scheduling is achievable

Confinement effect on CO2 and CH4 permeability in shale

Gas flow in shales follows a number of physical mechanisms that include Knudsen diffusion, Darcy flow, and adsorption in the matrix and micro pores. The aim of the study is to resolve the interplay of gas transport in these media at increased effective stress as well as net pore pressure. In this research, we investigated the nature of gas transport in the matrix of shale by sending He, CH4 and CO2 gases through a transient upstream pressure pulse decay instrument. A series of experiments were conducted at constant pore pressures and a gradually increasing confining pressure. The same study was done in three different scenarios, injecting He, CO2 and CH4. At a constant pore pressure, gas permeability appears to decrease with an increasing confining pressure and effective stress. With increasing effective stress, the slip factor also decreases along with the permeability. The decrease in slip could be attributed to prestressing, that is likely to create new fractures. Among the three purged gases, permeability of shale to CH4 is the highest, and that to CO2 is the lowest owing to its high adsorption. Higher permeability of CH4 against He, could be attributed to the dual transport mechanism

Total Glossectomy: Is Gracilis Free Flap the Answer to the Functioning Neotongue?

Abstract: The proper management for the advanced carcinoma of tongue has not been explained in texts and for long the treatment of choice varied from center to center. In our study the aim was the complete removal of the malignancy and at the same time tongue reconstruction was done. Three patients with advanced carcinoma tongue were managed with total Glossectomy and neck dissection followed by reconstruction with gracilis free flap. This provided the long survival with the least morbidity

Optimal source-sink matching and prospective hub-cluster configurations for CO2 capture and storage in India

At COP-26, India announced strong climate commitments of reaching net-zero greenhouse gas emissions by 2070. Meeting this target would likely require substantial deployment of CO2 capture and storage (CCS) to decarbonize existing large point sources of CO2. This study attempts to evaluate opportunities for deployment of CCS in India in the forthcoming decades. A GIS based approach was adopted for mapping existing sources of CO2 with the sinks. The results show that regionally-appropriate ways of moving towards CCS at scale exist in both the power and industrial sectors. Coupled analysis of these sectors with sinks shows that 8 clusters may be developed throughout the country to sequester 403 Mt-CO2 annually. These clusters are concentrated near Category-I oil basins and the Category-I coalfields (Damodar valley), which may also create suitable financial incentives by incremental oil and coalbed methane recovery respectively. Furthermore, a first-order costing analysis evaluates that the cost of avoidance across basins may range from $31 to$107/t-CO2, depending on the type of storage reservoir and the proximity to large point sources. A total of 12 suitable hubs and clusters were created based on annual emissions above 1 Mt of each large point source and their proximity with geological sinks.Accepted Author ManuscriptApplied Geophysics and Petrophysic

Pore morphology in thermally-treated shales and its implication on CO₂ storage applications: A gas sorption, SEM, and small-angle scattering study

A combination of high-resolution imaging, low-pressure gas adsorption, and small-angle X-ray and neutron scattering quantifies changes in the pore characteristics of pulverized shale samples under oxic and anoxic environments up to 300 ℃. Clay-rich early-mature shales have a fair potential to generate hydrocarbons, the total organic carbon content of which lies within a range of 2.9 % to 7.4 %. High-resolution imaging indicates restructuring and coalescence of Type III kerogen-hosted pores due to oxic heating, which causes up to 580 % and 300 % increase in the surface area and pore volume of mesopores respectively. Similarly, up to 300 % and 1200 % increase in micropore surface area and pore volume is observed post oxic heating. However, during anoxic heating, bitumen mobilizes, leads to pore-blockage, and reduces the surface area and pore volume up to 45 % and 12 % respectively without any significant mass loss up to 350 °C. Between 400 and 550 °C, considerable loss in mass occurred due to breaking of organic matter, facilitated by the presence of siderite that caused up to 30 % loss in mass. The test conditions display starkly opposite effects in pores that have a width of < 100 nm when compared to the larger macropore domain, which has a pore width in the range of 100 to 700 nm as inferred from their small-angle X-ray (SAXS) and neutron (SANS) scattering behaviour, respectively. Despite the formation of new mesopores or the creation of new networks of pores with rougher surfaces, the fractal behavior of accessible mesopores in combusted shales minimally increase mesopore surface roughness. The pyrolyzed shales exhibit decreased mesopore surface roughness at higher temperatures, which indicates smoothening of pores due to pore blocking. Increase in pore volume and surface area due to oxic-heat treatment enhances the feasibility of long-term CO2 storage in shales.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Applied Geophysics and Petrophysic